Polish ing-machine



(No Model.) 2 sheets-sheet 1. W. MGQUISTON. POLISHING MACHINE.

No. 405,589. Patented June 18, 1889.

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W. MGQUISTON. PQLISHING MACHINE.

No. 405,589.. Patented June 18, 1889.

f 50%@ 7h fau@ WILSON MCQUISTON, OF FORT VAYNE, INDIANA.

POLlSHlNG-VIACHINE.

SPECIFICATION forming part of Letters Patent No. 405,589, dated J une18, 1889.

Application filed June 18, 1888. Serial No. 277,494. (No model.)

T0 all whom, t may cm2/cern:

,Be it known that I, VILSON l\1`[CQUIsTON,a citizen of the UnitedStates, residing at Fort IVayne, in the county of Allen and State ofIndiana, have invented a new and useful Improvement inPolishing-Wlachines, of which the following is a specification.

My invention relates to that class of marble-polishing machines in whicha back-andforth movement, a movement from side to side, and a rotarymovement are imparted to the polishing-head, provided on its under facewith bristles, by means of a shaft journaled in one end of an arm orframe, the other end of which is loosely connected to one end of asecond arm or frame by means of a shaft, the other end of the second armor frame being loosely connected by a shaft to brackets fastened to awall or post in such a manner as to permit the arms to swing in ahorizontal plane, the rotary movement being produced by a series ofpulleys and drive-belts connecting the shaft holding the polishing-headto a convenient motor. The usual form of. apparatus upon which I use mydevice is shown in the patent of J. H. Cutler, dated February 9, 1886,No. 335,568, (title, polishing-machines,) but is equally applicableuponpolishing-machines in which the only movement is the rotary movement ofthe polishing-head and in which the article tobe polished can be movedat will underneaththe polisher.

My improvement consists in a device or hood partially covering thepolishing-head and rigidly attached by means of oblique braces to theshaft holding the polishing-head or to the arm or frame in which saidsha-ft is journaled, whereby the polishing compound is prevented frombeing thrown about or scattered by the centrifugal force of therevolving polisher.

In the drawings accompanying this speci- `fication and forming a partthereof, Figure l represents a side elevation of the arm or frame,partly broken away, showing the shaft and polisher with the hoodattached. Fig. 2 is a vertical sectional view of the shaft and polisherand hood. Fig. 3 is a plan view of the same. Fig. 4L is a plan view.Fig. 5 is a side view; and Fig. G is a side view of a modiiieation,showing the braces attached to the frame.

I have used similar letters throughout the ,different views to designatesimilar parts.

A is a vertical shaft, which revolves in the outer ends of the arms band l1 of the frame B, and to the lower end of which the polisher A isattached.

g is a small pulley-wheel rigidly attached to the shaft A. A belt ispassed over this pulley and over a similar one at the junction of thetwo arms of the frame. A third wheel is also attached tothe center shaftand a fourth upon the wall or bracket shaft. The rotary motion of thepolisher is imparted by a series of belts passed over these pulleys andconnected to some lconvenient motor. At the end of each of the arms b bis a double casting a a', each half of which is provided with the halfof a cylindrical socket. The shaft A revolves in these sockets. rlhemarble or other surface is placed underneath the polisher A. Thepolishing compound is placed upon the marble surface underneath thepolisher, by the revolutions of which the' polishing is accomplished.However, by the centrifugal force of the revolving polisher, thepolishing compound is thrown about and wasted. I prevent this by ahood,which consists of a broad circular band of any suitable material,such as tin, zinc, sheet-iron, or paper. The diameter of the band is alittle larger than that of the polisher, so as not to interfere with therevolutions of the same. The band is rigidly connected either to thelower arm b', so as to allow the shaft and polisher to revolveindependently of the hood, or to the shaft itself, so as to revolve withit. By preference I usually adopt the former method. The attachment ismade by two or more oblique braces rigidly bolted or riveted to the bandO and adjustably connected to the lower arm b or to the shaft byset-bolts through slots in the upper ends of the braces. This mode ofattachment permits the band to be lowered or raised to accommodateitself to the surface to be polished.

I have alluded to and briefly described a polishing-machine somewhatsimilar to that of J. II. Cutler, patented February fl, 1886;

but I do not desire to make auf)7 claim t0 that machine, and I limitmyself to my improvement, consisting of the band and the mode of itsattachment t0 the polishinglmachine; and

What I Wish to Obtain a patent 011 is- In apolishing-machine, a circularband surrounding the polishing-head and connected t0 the frame holding`the polishing-shaft by means of oblique braces rigidly attached t0 theband, having in the upper ends Vertical 1o slots, and attached to saidframe by set-bolts through said slots, substantially as described.

WILSON MCQUISTON. Witnesses:

JOHN MORRIS, Jr., ARTHUR W. BRADY.

